In a rare wireless hacking conviction, a Michigan man entered a guilty plea Friday in federal court in Charlotte, North Carolina for his role in a scheme to steal credit card numbers from the Lowe's chain of home improvement stores by taking advantage of an unsecured wi-fi network at a store in suburban Detroit.

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At some point, Lowe's network administrators and security personnel detected and began monitoring the intrusions, and called in the FBI. In November, a Bureau surveillance team staked out the Southfield Lowe's parking lot, and spotted a white Grand Prix with suspicious antennas and two young men sitting inside, one of them typing on a laptop from the passenger seat, according to court documents.
Source: http://www.securityfocus.com/news/8835